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Chapter 2 Notes

Chapter 2 Notes - For example take Co(NO 3 2 6H 2 0 One...

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If the atom appears just once in a compound you don’t need a subscript. Sometimes we don’t count atoms, but use parentheses to indicate structural formation. Hydrates Some compounds form special complexes with water. Calcium sulfate can “grab hold of” two water molecules. Threes water molecules are attached more strongly than the molecule sin a mixture and something else, but less strongly than the atoms in a compound. CaS0 4 . 2H 2 0 the two waters are placed after a dot. Counting Atoms Important to be able to count the number of atoms pf each element in a molecule even for ones with “weirder formulas”
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Unformatted text preview: For example take Co(NO 3 ) 2 . 6H 2 0.- One cobalt- Two nitrogen- Twelve Oxygen- Twelve Hydrogen Energy Energy is the capacity to make things move. Never created nor destroyed. Kinetic energy is the energy something moving already has. Potential energy is the energy that’s stored somehow, and ready to make something move. Energy of Molecules Temperature is the measure of the average kinetic energy of those molecules. Heat is the total amount of kinetic energy added to or removed form a bunch of molecules. Nonmetallic Compounds Many form compounds with hydrogen (Hydrides)...
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